20028233 has 6 divisors (see below), whose sum is σ = 20253582. Its totient is φ = 19803840.

The previous prime is 20028221. The next prime is 20028257. The reversal of 20028233 is 33282002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7333264 + 12694969 = 2708^2 + 3563^2 .

It is not a de Polignac number, because 20028233 - 2²² = 15833929 is a prime.

It is a super-2 number, since 2×20028233² = 802260234204578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47363 + ... + 47783.

It is an arithmetic number, because the mean of its divisors is an integer number (3375597).

Almost surely, 2^20028233 is an apocalyptic number.

It is an amenable number.

20028233 is a deficient number, since it is larger than the sum of its proper divisors (225349).

20028233 is an frugal number, since it uses more digits than its factorization.

20028233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20028233 is about 4475.2913871613. The cubic root of 20028233 is about 271.5694285256.

The spelling of 20028233 in words is "twenty million, twenty-eight thousand, two hundred thirty-three".